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How can I find what optic is in an interface for a Juniper MX-series router?

You need to be looking under the show chassis hardware stanza. That gives you all the inner-workings of the devices plugged into the chassis, including VC members. On an MX platform, this is along ...
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11 votes
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Can I use an OM3 fiber optics cable on 1gb transceiver J4858C?

EDIT: Fixing answer now that I'm on a real laptop. Yes, OM3 is just "laser optimized" multimode, it will work with both your optic and distance. What are the limitations in terms of bandwidth/...
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10 votes
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SFP+ transceiver's ability to do 1GbE

Short answer: in theory yes, in practice no. Long answer: There are SFP+ optics which can also work at 1 GbE, I've talked (sorry, no other source than that) to people who were experimenting with it ...
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8 votes
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Is it possible to permanently damage optical transceiver if Rx signal is too strong?

Your biggest risk comes from Single Mode ER (40 Km) and ZX (80 Km) optics, which can overdrive and even burn inputs without sufficient attenuation. There is no risk of burning Multi Mode optics, as ...
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7 votes
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Can a pair of matching WDM transceivers be connected directly?

Mutiplexers arrange multiple wavelengths onto a shared fiber - they don't change the signals. So yes, if the transmitter/receiver wavelengths match you can connect two transceivers with standard patch ...
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5 votes
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What certifications are there for Fiber Optic termination and splicing?

It's not terribly difficult to train yourself, if you care about the doing. If you care about selling yourself more, BICSI will happily take your money as a certifier. Probably better if you can get ...
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5 votes
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How to connect two networks via fiber optics (LC Connectors)

Go find another "IT Shop." LC connectors are arguably the most common fiber connector in use today. It's not clear from your question where you've run these fibers, but one fiber run (really a pair ...
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5 votes
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10G SFP+ transceiver with OM4 fiber cable - Maximum cable length?

If you have not already bought and installed the cable then you should install single mode fiber instead and use LR transcievers. This is the officially supported way to do links of that distance at ...
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4 votes

detect SFP transmit wavelength

Relying on SFP MSA is not a good options, as these specs are often faked to allow a specific switch to work with an incompatible device (I've see lots of bidirectionnal SFP which are identified as ...
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  • 425
4 votes

How can I find what optic is in an interface for a Juniper MX-series router?

Have a look at the output of show chassis hardware and show chassis pic fpc-slot <X> pic-slot <Y>
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  • 4,611
4 votes

Using a G. 655 with a G. 652.D fiber cable?

It will work. You will get more loss at the splice than if you were splicing like fiber but you can do it. You can even mix the fiber types in longer runs. Reference: Mixing of G655 and G652 ...
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4 votes
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Optical fibers out of service

does a bad equipment or a too high signal could break an optical fiber silica Not likely. To actually damage the fiber, you'd need very high transmit power (several Watt) not common with off-the-...
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4 votes

SFP-10G-LRM compatible with Single Mode Fiber?

It can use multimode, but it doesn't have to: The Cisco 10GBASE-LRM Module also supports link lengths of 300m on standard Single-Mode Fiber (SMF, G.652). From the data sheet.
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4 votes

What is the difference between LR1 and LR4 optics?

As in 10GBASE-LR versus 40GBASE-LR4? -L stands for long ~1300 nm wavelength (as opposed to -S for 850 nm and -E for ~1550 nm). -R stands for large block code 64b/66b. The suffix 4 stands for the ...
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3 votes
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Power at the terminals of a PLC fiber optic splitter

Here is an answer I found at the web site of a fiber optics manufacturer A common question we receive is whether a 50/50 beamsplitter can be used in reverse, to combine the signals ...
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3 votes
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Doubt about MMF and SMF speed

As the name implies a multi mode fibre can carry multiple modes of light. This is not the same thing as multiple signals. The multiple modes of the same signal only leads to modal dispersion which ...
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3 votes
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How many 3 dB couplers are needed to construct a 16 way fiber optic splitter?

Follow the math in the wiki article: (2^4)-1=15.
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3 votes

Macsec and Optics

Assuming you're talking about fiber optic transceivers commonly used in network equipment, the answer is MACsec has no impact on them. MACsec is a layer 2 protocol, while transceivers are simply ...
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3 votes
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Why do higher speed links require a stronger signal?

You can visualize a high-speed pulse signal by using an eye pattern. The "eye" opening is the measure of distinction between levels (vertical) and pulse sequence (horizontal). The larger the ...
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3 votes
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SFP+ 10GBASE-LR and attenuator

Most 10 km PHYs can talk to each other even over very short links. The key is whether the max launch power overshoots the max receive power, effectively blinding the receiver. With this transceiver, ...
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2 votes

How to connect two networks via fiber optics (LC Connectors)

For me, I find this an non-issue. IMHO, if it is infrastructure cabling it should terminate into a fiber tray. So ideally, I would acquire a fiber tray for each end of the connection with SC couplers (...
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2 votes
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Power Budget Based on Miniums?

4.5 dB is the maximum loss where it's still guaranteed to work. Of course, it will likely be better, but as they say, your mileage may vary.
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2 votes

detect SFP transmit wavelength

Anything that conforms to the SFP MSA ("specs") has an I2C interface to a PROM with those values stored within it. I have yet to see an SFP (or SFP+) that did not have that interface.
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2 votes
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What is the purpose of defect limit in Zone D in criteria for MM‐PC Connectors (IEC 61300‐3‐35)

Not all defects are negative. Any protruding defect, or loose contaminant particle, can prevent contact (holding the connector faces apart), scratch the mating connector, or in the case of a loose ...
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2 votes

What certifications are there for Fiber Optic termination and splicing?

The standards body, which also provides training and certifications, is BICSI. You must join BICSI. There are then classes, some offered by BICSI, some offered by approved third parties. You take ...
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2 votes
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Latency of AOC vs passive DAC

The difference here is incredibly trivial - literally on the order of single-digit nanoseconds. The amount of time it takes to get the packet organized and across the switch is likely 2- to 3- orders ...
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2 votes
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Using XFP-10G (120 KM Range) on Juniper MX routers

When we run the command 'show chassis hardware' , there is no such mentioning that its a NON-JNPR XFP. Based on this , can we say confidently that it must be XFP from Juniper side? The thing you're ...
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  • 6,440
2 votes

SFP+ 10GBASE-LR and attenuator

Launch power max 0.5 dBm, receive power max 0.5 dBm. Should be fine. Also, -8.2 to 0.5 dBm is a huge range for launch power, although this may be specified with aging in mind (launch power reduces ...
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